Fig. 2.
Lower limit of quantification in a) negative (top to bottom: tazobactam and dicloxacillin [IS]) and b) positive (top to bottom: dicloxacillin [IS], metronidazole, acyclovir, ampicillin, meropenem, piperacillin) ionization mode. Upper limit of quantification in c) negative (top to bottom: tazobactam and dicloxacillin [IS]) and d) positive (top to bottom: dicloxacillin [IS], metronidazole, acyclovir, ampicillin, meropenem, piperacillin) ionization mode. IS=internal standard.